Hi Chris, kernel test robot noticed the following build errors: [auto build test ERROR on bluetooth-next/master] [also build test ERROR on next-20240606] [cannot apply to bluetooth/master linus/master v6.10-rc2] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Chris-Lu/Bluetooth-net-add-hci_iso_hdr-function-for-iso-data/20240606-194619 base: https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git master patch link: https://lore.kernel.org/r/20240606114321.30515-5-chris.lu%40mediatek.com patch subject: [PATCH v4 4/4] Bluetooth: btusb: mediatek: add ISO data transmission functions config: x86_64-buildonly-randconfig-003-20240607 (https://download.01.org/0day-ci/archive/20240607/202406070759.EDNrdv4q-lkp@xxxxxxxxx/config) compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240607/202406070759.EDNrdv4q-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202406070759.EDNrdv4q-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): In file included from drivers/bluetooth/btusb.c:28: >> drivers/bluetooth/btmtk.h:259:9: error: incompatible pointer to integer conversion returning 'void *' from a function with result type 'int' [-Wint-conversion] 259 | return ERR_PTR(-EOPNOTSUPP); | ^~~~~~~~~~~~~~~~~~~~ 1 error generated. vim +259 drivers/bluetooth/btmtk.h 256 257 static int btmtk_isopkt_pad(struct hci_dev *hdev, struct sk_buff *skb) 258 { > 259 return ERR_PTR(-EOPNOTSUPP); 260 } 261 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki